Rita has only given you the "move server" documentation, which you do need to read as well if you're moving the server.
Upgrading JIRA is more https://confluence.atlassian.com/jira/upgrading-jira-185729508.html
I have multiple projects that use variations of the same base workflow. The variations depend on the requirements of the project or issue type. The variations mostly come in the form of new statuses ...
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